Hey Tosh,
Stick with window cleaning!
I know what you mean about considering other business ventures.
Window cleaning might seem boring because you have done it so long; weather makes it challenging; finding someone to help you; etc.
Stick with it! I have tried other ventures in the past and even with my college education as a teacher I have returned to window cleaning.
It is a needed service; so the need will always be there.
You are your own boss; pain in the rear; but you can always count on yourself. I have been in window cleaning 28 years now.
You see instant results from window cleaning; thus that is why we are window cleaners as we find this fulfilling.
Hang in there. The reasons are many; but obviously you are good at this and spring is just around the corner.
Cheers,
Texas Girl